node: Socket Activation with systemd using `libsystemd` — heartwood

rad:z3gqcJUoA1n9HaHKufZs5FCSGazv5

Radicle Heartwood Protocol & Stack

node: Socket Activation with systemd using `libsystemd`

Archived lorenz opened 1 year ago

This implements socket activation for radicle-node by cooperating with systemd. Patch 648d8d0 is an alternative implementation without using libsystemd.

For convenience, the libsystemd crate, which implements utilities (without linking any C code) is used. It boils down to reading a few environment variables and converting them into raw file descriptors in a light wrapper.

A recording of socket activation in action, where execution of rad node status automatically starts the node: https://asciinema.org/a/R7N2N9JPvU8MMQh4LRD2FJQzW.

Note that socket activation is nothing specific to systemd. On OS X, launchd supports the same mechanism with a similar API. The JavaScript library node-socket-activation implements socket activation for both systemd and launchd.